Lead-Selective Membrane Potentiometric Sensor Based On A Recently Synthesized Dimethyl Benzo Tetrathia Fulvalene

ABSTRACT

A PVC membrane electrode for lead ion based on dimethyl benzo tetrathia fulvalene(DMBTTF)as membrane carrier was developed. The electrode exhibits a Nernstian response for Pb²⁻ over a wide concentration range (10⁻²−10⁻⁵ M) with a limit of detection of 8^*10⁻⁶M. It has a response time of 20s and can be used for at least 2 months without any considerable divergence in potentials. The proposed membrane sensor revealed good selectivities for Pb²⁻ over a wide variety of other metal ions and could be used in pH range of 3.0-6.0.

Keywords::

• Lead ion-selective electrode
• PVC membranes
• dimethyl benzo tetrathia fulvalene